5.11 Men's A/T 6in Non-Zip Tactical Boots - The 5.11 A/T 6in is a performance boot built from the sole up to increase performance. The All Terrain Load Assistance System (A.T.L.A.S.) is a force multiplier for those who carry heavy weight on long shifts. Water resistant suede leather upper with high abrasion air mesh nylon 5.11 A.T.L.A.S. Technology Support Plate Echo foam high rebound/energy return PU and Force foam lightweight PU impact cushioning Style: 12440